Question
If ${ }^{n} C_{7}={ }^{n} C_{3}$, then find value of $n$
Step 1
We know that ${ }^{n} C_{r} = \frac{n!}{r!(n-r)!}$, where $n!$ is the factorial of $n$, $r!$ is the factorial of $r$, and $(n-r)!$ is the factorial of $(n-r)$. Show more…
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